Why do most injectors fail?
Actually, most injectors donít fail, they just become obstructed. During operation, the injector pintle only moves 0.1mm and the fuel exits through a hole no larger than the period at the end of this sentence. These small passages become impacted by microscopic deposits. One such offender is Olefin - found in all gasoline. Its hard deposits form on all injectors and are caused by todayís higher engine compartment temperatures.

Why is cleaning a better option than replacement?

COST . . .

Testing and ultrasonic cleaning of each injector will eliminate the need to buy new injectors which cost $75 to $160 each!

Our full service cleaning* ranges from $25.00 per injector for port injectors to $45.00 per injector of throttle body injectors.

*Our service includes:

  • Electric Testing
  • Leak Testing
  • Spray Pattern Analysis
  • Flow Rate and Volume Testing
  • Ultrasonic Cleaning
  • Installation of New Filter Baskets and Pintle Caps
  • New Seals and O-Rings
  • Test sheets on each injector showing before and after measurements
  • Quick turn-around
  • Injectors restored to like new condition!

Ninety percent of faulty injectors can be restored to like-new condition through the testing and ultrasonic cleaning process.   

Why ultrasonic cleaning? 
Isnít chemical cleaning just as effective?

Some service facilities do offer chemical and/or "on-car" cleaning methods. Using harsh chemicals to dissolve deposits can damage some injectors immediately and may cause long term damage to oxygen sensors and catalysts. Both GM and Nissan have issued technical bulletins warning technicians against this potentially expensive mistake. Ultrasonic cleaning, according to the Society of Automotive Engineers, is the most effective and safe cleaning method.

Why bother with flow testing first; canít they just be cleaned?
Measuring the delivery volume of each injector before it is cleaned and again after cleaning insures uniform distribution of fuel to each cylinder. An average restriction for any given injector, before cleaning, is 8%. This restriction results in a lean mixture at the oxygen sensor. The overall result is a richer mixture for the entire engine, as well as an emissions increase in hydrocarbons by 26%, and carbon monoxide by 16%! This hinders the carís performance, increases emissions, and may lead to more expensive repairs.

Testing also pinpoints those injectors which have either failed electrically or have pintle or seat damage and truly need to be replaced.

When is the best times to clean injectors?

  • when they are diagnosed with a problem.
  • whenever they are already removed for an engine repair.
  • during the routine replacement of injector seals as part of the 60,000 or 90,000 major service, as recommended by Bosch.

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